1998 Seville STS, 4.6 engine, 80k miles
I was passing a truck under heavy throttle and the engine died like I turned the key off.
Mountain road on a curve with no power steering and no power brakes...very hairy!
The DTC code U1255 "lost communications" shows on all of the following... DDM , DIM, IPC, RFA, RIM, VTD, MSM. The PCM had no codes. At the same time "service stability system" showed on dash.
The "lost communications" possible causes listed are...
-Loose control module connectors
-Faulty Control Module
-Control modules poor electrical connection
-Control Modules harness open or shorted
The engine will not start (no spark), and there is an electric humming from the back of engine (without key on) that is draining the battery.
Where do I start to solve this? Any help would be greatly appreciated!!